QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km SW of Seattle, Washington

· 24 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 21 kmKing County 42 kmPierce County 60 kmMason County 64 kmIsland County 69 kmSnohomish County 71 kmThurston County 78 kmJefferson County 89 kmLewis County 110 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.7 (ml)
Depth
24 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Kitsap County, 21 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 47.5710, -122.3867. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 21 km (13 mi) ESE of here earthquakes near Kitsap County
King County, WA 42 km (26 mi) WNW of here earthquakes near King County
Pierce County, WA 60 km (38 mi) NNW of here earthquakes near Pierce County
Mason County, WA 64 km (40 mi) ENE of here earthquakes near Mason County
Island County, WA 69 km (43 mi) SSE of here earthquakes near Island County
Snohomish County, WA 71 km (44 mi) SW of here earthquakes near Snohomish County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

55 earthquakes have been recorded within 50 km since this one.

  1. 1.5 Puget Sound region, Washington
  2. 1.7 Puget Sound region, Washington
  3. 2.2 7 km WSW of Seattle, Washington
  4. 1.9 3 km NNE of White Center, Washington
  5. 1.7 4 km SSW of Port Ludlow, Washington
  6. 1.6 5 km W of Burley, Washington
  7. 1.5 2 km SW of Gorst, Washington
  8. 1.9 1 km ENE of Enetai, Washington
  9. 1.6 0 km WSW of Esperance, Washington
  10. 1.7 5 km S of Black Diamond, Washington
  11. 1.7 1 km WNW of Bonney Lake, Washington
  12. 1.6 1 km NNW of Keyport, Washington
  13. 1.9 0 km W of Keyport, Washington
  14. 1.6 5 km SSW of Port Ludlow, Washington
  15. 2.7 4 km E of Lake Marcel-Stillwater, Washington

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 22,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.